Programmer-RD-AI opened a new pull request, #52729:
URL: https://github.com/apache/airflow/pull/52729

   This change addresses a race condition in the task runner where downstream 
failure callbacks might observe an uninitialized or stale `end_date` and 
`duration` on the `TaskInstance`. By explicitly setting `ti.end_date` before 
constructing the `TaskState` in all exception handlers, we guarantee that any 
`on_failure_callback` receives a fully populated context, preventing confusing 
debug sessions and user‐defined callback failures.
   
   **Key Changes:**
   
   * **Set `ti.end_date` early** in both `AirflowFailException` and generic 
exception handlers, before creating the `TaskState`.
   * **Populate `duration` automatically** by virtue of the populated 
`end_date`, ensuring callbacks can compute and report accurate runtime metrics.
   * **Update existing tests** and add a new test 
(`test_task_runner_on_failure_callback_context`) that verifies both `end_date` 
and non‐negative `duration` are present in the failure callback context.
   * **Fix race condition** where callbacks previously saw incomplete 
`TaskInstance` data, leading to misleading or missing timing information.
   
   This PR closes #52630
   


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